diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 08:49:20 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 08:49:20 -0800 |
commit | ce1d3fde87d1a21f1ec1147dde32b2825dd3a276 (patch) | |
tree | 6ffab43e47e3a22a76bf9bf4efeecdf1b90dcb6f /drivers/dma/amba-pl08x.c | |
parent | 928fce2f6d8152d897790c1a5bbeef5642f69e0e (diff) | |
parent | 88987d2c7534a0269f567fb101e6d71a08f0f01d (diff) | |
download | blackbird-obmc-linux-ce1d3fde87d1a21f1ec1147dde32b2825dd3a276.tar.gz blackbird-obmc-linux-ce1d3fde87d1a21f1ec1147dde32b2825dd3a276.zip |
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This update brings:
- the big cleanup up by Maxime for device control and slave
capabilities. This makes the API much cleaner.
- new IMG MDC driver by Andrew
- new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
bunch of fixes on rcar drivers
- odd fixes and updates spread over driver"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
dmaengine: pl330: add DMA_PAUSE feature
dmaengine: pl330: improve pl330_tx_status() function
dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
dmaengine: rcar-dmac: Fix spinlock issues in interrupt
dmaenegine: edma: fix sparse warnings
dmaengine: rcar-dmac: Fix uninitialized variable usage
dmaengine: shdmac: extend PM methods
dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
dmaengine: pl330: fix bug that cause start the same descs in cyclic
dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
dmaengine: at_xdmac: simplify channel configuration stuff
dmaengine: at_xdmac: introduce save_cc field
dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
ioat: fail self-test if wait_for_completion times out
dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
dmaengine: dw: amend description of dma_dev field
dmatest: move src_off, dst_off, len inside loop
...
Diffstat (limited to 'drivers/dma/amba-pl08x.c')
-rw-r--r-- | drivers/dma/amba-pl08x.c | 156 |
1 files changed, 90 insertions, 66 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 1364d00881dd..4a5fd245014e 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -1386,32 +1386,6 @@ static u32 pl08x_get_cctl(struct pl08x_dma_chan *plchan, return pl08x_cctl(cctl); } -static int dma_set_runtime_config(struct dma_chan *chan, - struct dma_slave_config *config) -{ - struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); - struct pl08x_driver_data *pl08x = plchan->host; - - if (!plchan->slave) - return -EINVAL; - - /* Reject definitely invalid configurations */ - if (config->src_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES || - config->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES) - return -EINVAL; - - if (config->device_fc && pl08x->vd->pl080s) { - dev_err(&pl08x->adev->dev, - "%s: PL080S does not support peripheral flow control\n", - __func__); - return -EINVAL; - } - - plchan->cfg = *config; - - return 0; -} - /* * Slave transactions callback to the slave device to allow * synchronization of slave DMA signals with the DMAC enable @@ -1693,20 +1667,71 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_cyclic( return vchan_tx_prep(&plchan->vc, &txd->vd, flags); } -static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int pl08x_config(struct dma_chan *chan, + struct dma_slave_config *config) +{ + struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); + struct pl08x_driver_data *pl08x = plchan->host; + + if (!plchan->slave) + return -EINVAL; + + /* Reject definitely invalid configurations */ + if (config->src_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES || + config->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES) + return -EINVAL; + + if (config->device_fc && pl08x->vd->pl080s) { + dev_err(&pl08x->adev->dev, + "%s: PL080S does not support peripheral flow control\n", + __func__); + return -EINVAL; + } + + plchan->cfg = *config; + + return 0; +} + +static int pl08x_terminate_all(struct dma_chan *chan) { struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); struct pl08x_driver_data *pl08x = plchan->host; unsigned long flags; - int ret = 0; - /* Controls applicable to inactive channels */ - if (cmd == DMA_SLAVE_CONFIG) { - return dma_set_runtime_config(chan, - (struct dma_slave_config *)arg); + spin_lock_irqsave(&plchan->vc.lock, flags); + if (!plchan->phychan && !plchan->at) { + spin_unlock_irqrestore(&plchan->vc.lock, flags); + return 0; } + plchan->state = PL08X_CHAN_IDLE; + + if (plchan->phychan) { + /* + * Mark physical channel as free and free any slave + * signal + */ + pl08x_phy_free(plchan); + } + /* Dequeue jobs and free LLIs */ + if (plchan->at) { + pl08x_desc_free(&plchan->at->vd); + plchan->at = NULL; + } + /* Dequeue jobs not yet fired as well */ + pl08x_free_txd_list(pl08x, plchan); + + spin_unlock_irqrestore(&plchan->vc.lock, flags); + + return 0; +} + +static int pl08x_pause(struct dma_chan *chan) +{ + struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); + unsigned long flags; + /* * Anything succeeds on channels with no physical allocation and * no queued transfers. @@ -1717,42 +1742,35 @@ static int pl08x_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, return 0; } - switch (cmd) { - case DMA_TERMINATE_ALL: - plchan->state = PL08X_CHAN_IDLE; + pl08x_pause_phy_chan(plchan->phychan); + plchan->state = PL08X_CHAN_PAUSED; - if (plchan->phychan) { - /* - * Mark physical channel as free and free any slave - * signal - */ - pl08x_phy_free(plchan); - } - /* Dequeue jobs and free LLIs */ - if (plchan->at) { - pl08x_desc_free(&plchan->at->vd); - plchan->at = NULL; - } - /* Dequeue jobs not yet fired as well */ - pl08x_free_txd_list(pl08x, plchan); - break; - case DMA_PAUSE: - pl08x_pause_phy_chan(plchan->phychan); - plchan->state = PL08X_CHAN_PAUSED; - break; - case DMA_RESUME: - pl08x_resume_phy_chan(plchan->phychan); - plchan->state = PL08X_CHAN_RUNNING; - break; - default: - /* Unknown command */ - ret = -ENXIO; - break; + spin_unlock_irqrestore(&plchan->vc.lock, flags); + + return 0; +} + +static int pl08x_resume(struct dma_chan *chan) +{ + struct pl08x_dma_chan *plchan = to_pl08x_chan(chan); + unsigned long flags; + + /* + * Anything succeeds on channels with no physical allocation and + * no queued transfers. + */ + spin_lock_irqsave(&plchan->vc.lock, flags); + if (!plchan->phychan && !plchan->at) { + spin_unlock_irqrestore(&plchan->vc.lock, flags); + return 0; } + pl08x_resume_phy_chan(plchan->phychan); + plchan->state = PL08X_CHAN_RUNNING; + spin_unlock_irqrestore(&plchan->vc.lock, flags); - return ret; + return 0; } bool pl08x_filter_id(struct dma_chan *chan, void *chan_id) @@ -2048,7 +2066,10 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) pl08x->memcpy.device_prep_dma_interrupt = pl08x_prep_dma_interrupt; pl08x->memcpy.device_tx_status = pl08x_dma_tx_status; pl08x->memcpy.device_issue_pending = pl08x_issue_pending; - pl08x->memcpy.device_control = pl08x_control; + pl08x->memcpy.device_config = pl08x_config; + pl08x->memcpy.device_pause = pl08x_pause; + pl08x->memcpy.device_resume = pl08x_resume; + pl08x->memcpy.device_terminate_all = pl08x_terminate_all; /* Initialize slave engine */ dma_cap_set(DMA_SLAVE, pl08x->slave.cap_mask); @@ -2061,7 +2082,10 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id) pl08x->slave.device_issue_pending = pl08x_issue_pending; pl08x->slave.device_prep_slave_sg = pl08x_prep_slave_sg; pl08x->slave.device_prep_dma_cyclic = pl08x_prep_dma_cyclic; - pl08x->slave.device_control = pl08x_control; + pl08x->slave.device_config = pl08x_config; + pl08x->slave.device_pause = pl08x_pause; + pl08x->slave.device_resume = pl08x_resume; + pl08x->slave.device_terminate_all = pl08x_terminate_all; /* Get the platform data */ pl08x->pd = dev_get_platdata(&adev->dev); |